Multi-block sulfonated poly(phenylene) copolymer proton exchange membranes
| DWPI Title: Synthesizing multi-block sulfonated Diels Alder poly(phenylene) copolymer, comprises e.g. synthesizing poly(phenylene) polymer oligomer, converting end-cap groups to reactive functional group, and sulfonating multi-block copolymer |
| Abstract: Improved multi-block sulfonated poly(phenylene) copolymer compositions, methods of making the same, and their use as proton exchange membranes (PEM) in hydrogen fuel cells, direct methanol fuel cells, in electrode casting solutions and electrodes. The multi-block architecture has defined, controllable hydrophobic and hydrophilic segments. These improved membranes have better ion transport (proton conductivity) and water swelling properties. |
| Use: The method is useful for synthesizing multi-block sulfonated Diels Alder poly(phenylene) copolymer (claimed), which is used as proton exchange membranes in hydrogen fuel cells, direct methanol fuel cells, electrode casting solutions and electrodes. |
| Advantage: The method provides: multi-block sulfonated Diels Alder poly(phenylene) copolymer having defined and controllable hydrophobic and hydrophilic segments; and multi-block sulfonated Diels Alder poly(phenylene) copolymer for membranes having improved ion transport (proton conductivity), water swelling properties, membrane hydration and improved physical properties. |
| Novelty: Synthesizing multi-block sulfonated Diels Alder poly(phenylene) copolymer, comprises: (a) synthesizing end-capped, controlled molecular weight Diels Alder poly(phenylene) polymer (DAPP) oligomer; (b) converting the end-cap groups to a reactive functional group; (c) linking the DAPP oligomer with a second polymer segment, to make a multi-block copolymer; and (d) sulfonating the multi-block copolymer by attaching acid groups onto only the DAPP repeating units, thus producing a multi-block sulfonated Diels Alder poly(phenylene) copolymer having both hydrophobic and hydrophilic segments. |
| Filed: 4/17/2009 |
| Application Number: US2009425413A |
| Tech ID: SD 11085.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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